28345769970 has 128 divisors (see below), whose sum is σ = 81975490560. Its totient is φ = 6127902720.

The previous prime is 28345769941. The next prime is 28345769971. The reversal of 28345769970 is 7996754382.

It is not an unprimeable number, because it can be changed into a prime (28345769971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2552049 + ... + 2563131.

It is an arithmetic number, because the mean of its divisors is an integer number (640433520).

Almost surely, 2^28345769970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28345769970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40987745280).

28345769970 is an abundant number, since it is smaller than the sum of its proper divisors (53629720590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28345769970 is a wasteful number, since it uses less digits than its factorization.

28345769970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11760.

The product of its (nonzero) digits is 22861440, while the sum is 60.

The spelling of 28345769970 in words is "twenty-eight billion, three hundred forty-five million, seven hundred sixty-nine thousand, nine hundred seventy".